IGRPhotoTweaks

IGRPhotoTweaks is a swift 3.0 library allow to expand an interface to crop photos, based on PhotoTweaks. It can let user drag, rotate, scale the image, and crop it. You will find it mimics the interaction of Photos.app on iOS 9. :]

Usage

IGRPhotoTweaksViewController is a base interface for YourPhotoTweaksViewController. IGRPhotoTweaksViewController offers all the operations to crop the photo, which includes translation, rotate and scale.

To use it,

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "showCrop" {

        let yourCropViewController = segue.destination as! YourPhotoTweaksViewController
        yourCropViewController.image = sender as! UIImage
        yourCropViewController.delegate = self;
    }
}

self.cropAction() is the func calls the edit done action.

self.dismissAction() is the func calls the cancel edit action.

self.changedAngel(value: radians) is the func to set rotation angle.

self.setCropAspectRect(aspect: "9:16") is the func to set aspect ratio for crop view.

self.resetAspectRect() is the func resets all previous aspect ratio.

self.resetView() is the func resets all previous actions.

Get the cropped image

extension ViewController: IGRPhotoTweakViewControllerDelegate {
    func photoTweaksController(_ controller: IGRPhotoTweakViewController, didFinishWithCroppedImage croppedImage: UIImage) {
        self.imageView?.image = croppedImage
        _ = controller.navigationController?.popViewController(animated: true)
    }

    func photoTweaksControllerDidCancel(_ controller: IGRPhotoTweakViewController) {
        _ = controller.navigationController?.popViewController(animated: true)
    }
}

Customize View

override func viewDidLoad() {
    super.viewDidLoad()

    IGRCropLine.appearance().backgroundColor = UIColor.green
    IGRCropGridLine.appearance().backgroundColor = UIColor.yellow
    IGRCropCornerView.appearance().backgroundColor = UIColor.purple
    IGRCropCornerLine.appearance().backgroundColor = UIColor.orange
    IGRCropMaskView.appearance().backgroundColor = UIColor.blue
    IGRPhotoContentView.appearance().backgroundColor = UIColor.gray
    IGRPhotoTweakView.appearance().backgroundColor = UIColor.brown

    self.photoView.isHighlightMask = true
    self.photoView.highlightMaskAlphaValue = 0.2
    self.maxRotationAngle = CGFloat(M_PI)
    self.isAutoSaveToLibray = true
}

override func borderColor() -> UIColor {
    return UIColor.red
}

override func borderWidth() -> CGFloat {
    return 2.0
}

override func cornerBorderWidth() -> CGFloat {
    return 4.0
}

override func cornerBorderLength() -> CGFloat {
    return 30.0
}

Example

IGRPhotoTweaks.xcodeproj -> IGRPhotoTweaks target /Example

Installation

IGRPhotoTweaks is available on CocoaPods. Add the follwing to your Podfile:

pod 'IGRPhotoTweaks', '~> 1.0.0'

Alternatively, you can manually drag the IGRPhotoTweaks folder into your Xcode project.

Protip

If using with an existing UIImagePickerController, be sure to set allowsEditing = NO otherwise you may force the user to crop with the native editing tool before showing IGRPhotoTweaksViewController.